/*
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 */
package org.activiti.rest.editor.model;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.activiti.editor.constants.ModelDataJsonConstants;
import org.activiti.engine.ActivitiException;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Model;
import org.apache.batik.transcoder.TranscoderInput;
import org.apache.batik.transcoder.TranscoderOutput;
import org.apache.batik.transcoder.image.PNGTranscoder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.*;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;

import lombok.extern.slf4j.Slf4j;

/**
 * @author Tijs Rademakers
 */
@RestController
@RequestMapping("/service")
@Slf4j
public class ModelSaveRestResource implements ModelDataJsonConstants {

    @Autowired
    private RepositoryService repositoryService;

    @PostMapping(value = "/model/{modelId}/save")
    @ResponseStatus(value = HttpStatus.OK)
    public void saveModel(@PathVariable String modelId, String name, String description, String json_xml,
        String svg_xml, HttpServletRequest request, HttpServletResponse response) {
        try {
            Map<String, String[]> map = request.getParameterMap();
            JSONObject jsonObject = new JSONObject();
            // 全跑到key了，可取方案
            for (Map.Entry<String, String[]> entry : map.entrySet()) {
                String data = entry.getKey() + "=" + (entry.getValue()[0]);
                jsonObject = JSON.parseObject(data);
            }
            name = (String)jsonObject.get("name");
            description = (String)jsonObject.get("description");
            json_xml = (String)jsonObject.get("json_xml");
            svg_xml = (String)jsonObject.get("svg_xml");

            Model model = repositoryService.getModel(modelId);
            JSONObject object = new JSONObject();
            object.put(MODEL_NAME, name);
            object.put(MODEL_DESCRIPTION, description);
            model.setMetaInfo(object.toString());
            model.setName(name);
            repositoryService.saveModel(model);

            repositoryService.addModelEditorSource(model.getId(), json_xml.getBytes("utf-8"));

            InputStream svgStream = new ByteArrayInputStream(svg_xml.getBytes("utf-8"));
            TranscoderInput input = new TranscoderInput(svgStream);

            PNGTranscoder transcoder = new PNGTranscoder();
            // Setup output
            ByteArrayOutputStream outStream = new ByteArrayOutputStream();
            TranscoderOutput output = new TranscoderOutput(outStream);

            // Do the transformation
            transcoder.transcode(input, output);
            final byte[] result = outStream.toByteArray();
            repositoryService.addModelEditorSourceExtra(model.getId(), result);
            outStream.close();

        } catch (Exception e) {
            log.error("Error saving model", e);
            throw new ActivitiException("Error saving model", e);
        }
    }
}
